feat(cart): Line items operations

[olivermrbl]

awaiting #6012

What

Add line items

await cartModuleService.addLineItems("cart_1234", [{ title: "test", unit_price: 100 }])

await cartModuleService.addLineItems([{ title: "test", unit_price: 100, cart_id: "cart_1234" }])

await cartModuleService.addLineItems({ title: "test", unit_price: 100, cart_id: "cart_1234" })

Update line items

// selector based approach
await cartModuleService.updateLineItems({ variant_id: "var_1234" }, { thumbnail: "test" })

await cartModuleService.updateLineItems("line_1234", { title: "test", unit_price: 100 })

// bulk selector based approach
await cartModuleService.updateLineItems([{ selector: { cart_id: "cart_1234" } , data: { title: "test", unit_price: 100 }}])

Remove line items

// selector based approach
await cartModuleService.removeLineItems({ variant_id: "var_1234" })

await cartModuleService.removeLineItems("cali_1234")

await cartModuleService.removeLineItems(["cali_1234", "cali_4321"])

The first is a selector-based removal. In this example, we want to remove all line items that have variant_id=var_1234. Imagine you accidentally published a product that was not supposed to go live for another two months. The selector-based approach handles this scenario very elegantly.

---

Additionally, the PR comes with tests for all and a few typings updates.

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[carlos-r-l-rodrigues]

Will you update all the joiner-config file reflecting all the entities when the module is done?

[olivermrbl]

Will you update all the joiner-config file reflecting all the entities when the module is done?

@carlos-r-l-rodrigues, yes – my idea was to add all the "configurational" bits and pieces as well as the migration in the end to avoid having to re-review it numerous times as things change. OK with you?

[adrien2p]

I think it is ok. I quite like the incremental implementation approach you have used so far. But indeed, we should not forget some part in the end. Maybe when doing this approach we should have a check list of what should be included in the module development process. Cause it is nice to have smaller reviews, but it is also easy to forget something in between the first and last pr

[olivermrbl]

Any final comments?

[adrien2p]

LGTM strong work 💪